Rotary-disk plow.



No; 629,133. A Patented my ra, m99. G. s'PALnmG & .L s. rmms.

ROTARY .DISK PLOW. (Application med Nov. 1, 1s97.

(Nb Model.)

GEORGE SPALDING AND JOHN S. ROBBINS, OF SAN PATENT OFFICE.

FRANCISCO, CALIFORNIA,

ASSIGNORS TO THE-SPALDING-ROBBINS DISC PLOW COMPANY, OF SAME PLACE.

ROTARY-015K PLOW.

SPECIFIGATION forming part of Letters Patent No. 629,138, dated July 18, 1899. Application le. November 1, 1897. Serial No. 6 57,098. (No model.)

To all whom it may concern:

Beit known thatwe, GEORGE SPALDING and JOHN S. ROBBlNs,citizens of the United States,

residing at San Francisco, in the county of San Francisco and State of California, have invented certain new andl useful Improvements in Rotary-Disk Plows; and we do hereby declare the following to be a full, clear, and

exact description of said invention, such as y.is

will enable others skilled in the art to which it most nearly appertains to make, use, and practice the same. A

This invention relates to improvements in rotary-disk plows, and more .particularly to the weighted carrying-wheels therefor.

The objects which are sought to be attained by this invention areto provide extra'holdin gattachments for overcoming the side draft of the plow and to so construct the parts that this extra increase'may he attached and cle-- tached at will. v l y The invention consists in providing carryin g-wheels with sharpened flange-like exten- 'same wheel, showing the weights in position with the extended Iiange on the inner weight. Fig. 3 is a side elevation of the same wheel, partly cut away, showing the extended flange as applied to the tread lof the wheel direct. Fig. 4. is a vertical section of the land-wheel employed in this form of piows, showing the ladded weight provided with the extendedl iange on one side of the wheel. Fig. 5- is a similar view of the same wheei provided with twol similar weights, one upon each side. Fig. 6 is a front View of the same wheel, showing the extended fiange as integral with the said wheel mounted in the center ofthe tread thereof. 1

The wheelsvherein shown anddescribed are ythose whichV are termed weighted carryingwheels and are shown by us in the Patent, No.- 587,459, which was issued on the 3d day of August, 1897. The furrow-wheels of the shape and incline shown in Figs. l, 2, and 3 are mounted upon a beam,wl1ich is horizontally inclined to the line' of draft of the team. This beam may be elongated or shortened to carry an added or diminished number .of rotary-disk plows.Y The said plows, as shown in the patent above referred to, are inclined in the direction opposite to the said beam to which they and the said furrow-wheels are connected. The inclination of the plows produces in them a tendency to runin the direction of their perpheries or across the line of draft, which tendency uniess overcome would compel the plows to drift or runv across the yline of draft without turning theearth to form the furrows. venting this drifting or side draft and to compel the plows to turn the furrows that the furrow-wheels A are employed. They are mounted upon inclined axles, over which the journals A t. By means of the inclination which is thus imparted tothe wheel the full side `A2, with which the wheels are provided, `is presented to the side of the furrow in a 'perpendicular position, as shown in drawings in Figs. I1, 2, and 3. Iny the operation of the -plow these furrow-wheels are compelled to trackin the furrows which have been previously 'formed next to the solid land, so that the solid face A2 of the wheels bear against the solid walls of the furrows. In their arrangement at either end of the beam, upon which the plows are carried, they are compelled to track in the furrowtnext to the solid land which was formed in a previous opera- It is for the -purpose of pre- I tion ofthe plow and in the last furrow which is being formed by the present operation of the plow. By this arrangement and construction the side draft above referred to on the part of the plows is transferred tothe 95 said wheels A, forcing them against the solid walls of the furrow in which they are running. While the former construction of these furrow-wheels has been suicie'nt for a limited number of rotary-disk plows, it has Ioo been discovered'that with added plows the force exerted is sufficient to produce an increased friction of the wheels A upon the side of the 'furrows to raise the said wheels vertically out of the furrow until they escape from the same-and allow the plow-frame to drift tothe side out of line. It is to overcome this defect that we have added the eX- tended flange B. This ange extends radially beyond the tread X of the wheel, and thus sinking into the bottom of the furrow adds to the resistance to the side draft. Its principal operation, however, is not merely to provide an added surface for resisting the side draft, so much as to present a sharp edge upon the peripheries of the wheels, to which it is applied, to cause the wheels to track or follow any inclination in which they are set horizontally.

The horizontal inclination referred to is caused by mounting the axle on which the wheels are set at a slight angle horizontally to the line of draft to throw the forward edge of the wheels slightly outward to give them a list or tendency to run to the side opposite to that to which the plows are tending to run. iVhen provided with the flange B, which enters the ground, the forward part of that section which enters tracks alittle to one side and 'tothe outside of the line of draft. As the flange B does not release the earth which it is thus extended into, it exerts a considerable pull or pressure outward or against the disks, thereby relieving to a great extent the pressure of the sides A2 of the furrow-wheels upon the solid side of the furrow.

In the most approved form the cutting edge or flange B is appliedto the Weights O and D as desired. It has been discovered that in some qualities of ground the edge B is not needed,` while in others and usually harder grounds it is needed. Therefore the edge is generally applied to the weights C and D, which are added to the wheels by means 0f bolts E. In grounds where the extreme weight is used the edge is applied to the outer weight C, for the reason that it is not required eX- cept when this weight is required, while in grounds of lighter substance it is added to the weight D as soon as any additional weight is required to aid the wheels A. i/Vhile it is preferred to apply the said flange to the furrow-wheel A, (shown in Figs. 1, 2, and 3,) it can also be applied to the' land-wheel F, as shown in Figs. 4, 5, and 6, Figs. 4 and 5 showing said flange upon weights C, attached to the wheelfand Fig. 6 showing the flange upon the wheel proper.

The land-Wheel F, as will be seen by reference to patent above mentioned, is a vertical wheel designed to roll on the solid ground opposite that being plowed. By providing this wheel or the weights carried on the same with the ilange B and turning it slightly toward the plowed grounda further additional resistance to the pressure of the disks isadded by means of this wheel.

Havingthus described this invention, what is claimed isl. In a device of thenature indicated, a carrying-wheel, a disk removablysecured to said wheel and having on its periphery a sharp edge or flange extending radially beyond the tread of the wheel, and a weight removably secured to the wheel and lying inside of the cutting edge of the disk, whereby said cutting edge projects radially beyond both the Wheel and the weight; substantially as described.

2. In adevice of the nature indicated, a carryingwheel having a laterally-projecting flange forming a tread, a disk upon the side of the wheel having the flange and resting against said :flange but out of contact with theface of the wheel, whereby a chamber is formed between the disk and the wheel, a' flange upon the disk projecting radially beyond the wheel-tread, a weight in the chamber between the wheel and the disk, and means for holding the parts removably connected; substantially as described.

In testimony whereof we have hereunto set our hands this 25th day of October, 1897.

GEORGE SPALDING.

- JOHN S. ROBBINS.

Vitnesses:

BALDWIN VALE, F. M. EAcHUs. 

